Multiple needle gun and its guide pin

Abstract

A multi-needle nail gun and a guide member thereof, the guide member comprising a base plate and an extension set surrounding the base plate to define a needle space. The base plate includes a base wall and a recess portion. The base wall has a flat back side and two abutting sides. The recess portion has a groove bottom side spaced apart from the abutting sides and two groove peripheral sides. Each of the groove peripheral sides is substantially perpendicularly connected to the corresponding abutting side in the front-back direction. The extension set is integrally injection molded with the base plate. By integrally injection molding, each of the groove peripheral sides and the corresponding abutting side forms a right-angled mesa to generate sufficient abutting area to ensure that a nail needle can be stably abutted against the abutting side to achieve the effect of stable needle ejection.

Description

Technical Field

[0001] This invention relates to a handheld firing tool for injecting needles, and more particularly to a variety of needle guns and their needle guides. Background Technology

[0002] See Figure 1 and Figure 2 Taiwan Patent Publication No. TW202504731A discloses a guide pin component and a nail gun including the guide pin component. The nail gun includes a cover 100, a nail rail 110 suitable for mounting multiple nail pins 10, and a guide pin component 1. The cover 100 is used to cover the nail pins 10 and has two guide ribs 101 (only one guide rib 101 is shown in the drawings due to the viewing angle). The guide pin component 1 is a single integrally formed component and includes a plate 11 with a three-tiered platform structure. The plate 11 has a first side surface 111, a second side surface 112 opposite to the first side surface 111, a first groove 113 recessed in the first side surface 111, and two second grooves 114 recessed in the first side surface 111 and located on the left and right sides of the first groove 113.

[0003] The guide pin component 1 is manufactured by stamping. The material (i.e., the plate 11) is placed into a stamping die and pressure is applied to shape it into the desired form. While the aforementioned metal stamping process has the advantage of high production efficiency, its processing accuracy is limited by the die. For example... Figure 1 As shown, the second side 112 of the plate 11 will have a protrusion or depression relative to the first side 111 (that is, when the first side 111 is depressed, the second side 112 is protruding, and vice versa), resulting in poor flatness.

[0004] In addition, such as Figure 3 As shown, due to the limitations of the stamping process, the stepped areas of the aforementioned three-tiered platform structure (i.e., the junction of the first groove 113 and the second groove 114) form a slightly curved transition, rather than a right-angled platform. Therefore, when one of the pins 10 is positioned in the second groove 114, it is prone to shifting from the second groove 114 to the first groove 113 due to skewness, causing the pin 10 to be unable to firmly rest against the second groove 114, thereby affecting the stability of the pin ejection. Summary of the Invention

[0005] The purpose of this invention is to provide a guide pin with high flatness and improved needle delivery stability.

[0006] The guide pin of the present invention is suitable for mounting in the housing unit of various nail guns. The guide pin includes a base plate and an extension assembly.

[0007] The substrate includes a base wall extending in a vertical direction and a groove formed in the base wall. The base wall has a flat rear side, a front side opposite to the rear side in a front-rear direction, and two abutment surfaces opposite to the rear side in the front-rear direction. The groove is recessed in the front side and has a groove bottom surface spaced apart from the abutment surfaces in the front-rear direction, and two groove peripheral side surfaces respectively connected to the left and right sides of the groove bottom surface. Each groove peripheral side surface is substantially perpendicularly connected to the corresponding abutment surface in the front-rear direction, and each abutment surface is spaced apart from the groove bottom surface by a first distance D1 in the front-rear direction.

[0008] The extension assembly and the substrate are integrally injection molded, and together with the substrate, define a needle-receiving space. The extension assembly includes a first extension wall and a second extension wall spaced apart in a left-right direction and extending from the front side away from the rear side, and has two extension wall surfaces respectively formed on the side of the first and second extension walls opposite to the base wall. Each extension wall surface is spaced apart from the corresponding abutment surface in the front-rear direction, and is separated from the bottom surface of the groove by a second distance D2 in the front-rear direction, where D2:D1 is between 8:1 and 4:1. The left-right direction is substantially perpendicular to the up-down direction and the front-rear direction.

[0009] The guide pin of the present invention further includes a first rib extending along the vertical direction and protruding from the bottom surface of the groove, wherein the first rib is close to the first extending wall along the horizontal direction.

[0010] The guide pin of the present invention further includes two second ribs extending along the vertical direction and protruding from the bottom surface of the groove. The second ribs are spaced apart along the left-right direction, and the length of each second rib extending along the vertical direction is less than the length of the first rib extending along the vertical direction.

[0011] The guide pin of the present invention has a first extension wall of the extension assembly having a first protrusion adjacent to the corresponding extension wall surface and facing the pin receiving space.

[0012] The guide pin member of the present invention has a second extension wall of the extension assembly having a second protrusion facing the pin receiving space and close to the groove portion.

[0013] The guide pin of the present invention further includes a fitting plate, wherein the first extension wall has a first groove extending recessed from the corresponding extension wall surface toward the front side surface, and the second extension wall has a second groove extending recessed from the corresponding extension wall surface toward the front side surface. The fitting plate is connected to the extension assembly and has a fitting wall extending along the left-right direction and fitted into the first groove and the second groove, and a fitting groove formed in the fitting wall and toward the pin receiving space.

[0014] In the guide pin of the present invention, the length of the second groove extending along the vertical direction is greater than the length of the first groove extending along the vertical direction.

[0015] The guide pin member of the present invention has a second extension wall having a convex ridge facing the pin receiving space and moving away from the groove in the vertical direction.

[0016] Another objective of this invention is to provide a variety of needle guns that can improve needle delivery stability.

[0017] The present invention includes various nail guns comprising a housing unit, a nail rail, a nail guide as described above, a nail guide seat, and a nail-driving blade.

[0018] The housing unit surrounds and defines the accommodating space.

[0019] The nail rail is disposed in the accommodating space and is suitable for accommodating multiple nails.

[0020] The guide pin is disposed in the accommodating space.

[0021] The guide pin seat is connected to the pin rail and faces the guide pin member. The guide pin seat and the guide pin member cooperate to define a space that communicates with the pin receiving space and has a downward-facing driving hole.

[0022] The hammerhead is disposed in the receiving space and is operably movable along the vertical direction. The hammerhead is positioned above the nail hole along the vertical direction and is adapted to drive one of the nails out of the nail hole.

[0023] The present invention provides various types of nail guns, wherein the first extension wall of the extension assembly has a first notch adjacent to the nail-driving hole, the second extension wall has a second notch adjacent to the nail-driving hole and disposed opposite to the first notch in the left-right direction, and the guide nail seat has two guide nail portions that can be respectively embedded in the first notch and the second notch, each of the guide nail portions having a guide surface near the nail-driving hole.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The extension assembly and the substrate are integrally injection molded. Since injection molding directly shapes the material using a mold, it avoids material deformation issues that occur during the stamping process, resulting in excellent flatness. Furthermore, the right-angled platform formed by integral injection molding (i.e., each groove peripheral side surface and the corresponding abutment surface) generates sufficient abutment area to ensure that the pin can be firmly supported by the abutment surface, achieving a stable pin delivery effect.

[0026] 2. By using a structural design where the second distance D2 is greater than the first distance D1, compared to the existing method of using a cover to guide the nail, the first extension wall and the second extension wall of the present invention can directly guide the nail set on the nail rail and ensure that the nail is properly positioned. Therefore, the present invention can also save the cost of setting an additional cover. Attached Figure Description

[0027] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, wherein:

[0028] Figure 1 It is an exploded three-dimensional diagram illustrating a conventional nail gun disclosed in Taiwan Patent No. TW202504731A.

[0029] Figure 2 This is a perspective view illustrating the nail guide component of the existing nail gun;

[0030] Figure 3 This is a cross-sectional schematic diagram illustrating the nail pin being disposed on the guide nail component of the existing nail gun;

[0031] Figure 4 This is an exploded perspective view illustrating various embodiments of the needle gun of the present invention;

[0032] Figure 5 This is a cross-sectional view of the embodiment described;

[0033] Figure 6 This is a partial exploded perspective view of the embodiment described;

[0034] Figure 7 This is an incomplete partial perspective view illustrating the guide pin component of the described embodiment;

[0035] Figure 8 Viewing it from another angle Figure 7 An incomplete partial 3D image;

[0036] Figure 9 yes Figure 8 Front view;

[0037] Figure 10(A) is along Figure 9Figure 10(B) is a partial enlarged view of Figure 10(A) taken by line XX in the figure.

[0038] Figure 11 This is an incomplete partial front view illustrating the connection relationship between the guide pin, the nail-driving piece, and the guide pin seat in the embodiment described above.

[0039] Figure 12 This is a schematic diagram illustrating the interaction between the guide pin and the U-shaped pin in the embodiment described above.

[0040] Figure 13 This is a schematic diagram illustrating the interaction between the guide pin and the U-shaped pin in the embodiment described above.

[0041] Figure 14 This is a schematic diagram illustrating the interaction between the guide pin and another U-shaped pin in the embodiment described above.

[0042] Figure 15 This is a schematic diagram illustrating the interaction between the guide pin and another wider U-shaped pin in the embodiment described above.

[0043] Figure 16(A) is along Figure 15 Figure 16(B) is a partial enlarged view of Figure 16(A) taken by line XVI-XVI.

[0044] Figure 17 This is an incomplete partial three-dimensional exploded diagram illustrating an example of the variation in the T-shaped pin arrangement on the guide pin component;

[0045] Figure 18 yes Figure 17 A combined diagram. Detailed Implementation

[0046] Before this embodiment is described in detail, it should be noted that similar components are represented by the same numbers in the following description.

[0047] See Figure 4 , Figure 5 and Figure 6 This invention provides an embodiment of a multi-needle nail gun suitable for setting multiple nails 9. In this embodiment, the user can select and set a single type of nail 9, such as any one of a U-shaped nail, a U-shaped nail, or a T-shaped nail, in a single operation according to practical needs. The multi-needle nail gun includes a housing unit 2, a nail rail 3, a nail guide 4, a nail guide seat 7, and a nail-driving plate 8.

[0048] The housing unit 2 surrounds and defines an accommodating space 20, and includes a top-mounted, operable pressure handle 21.

[0049] The nail rail 3 extends along the front-to-back direction Y and is disposed in the accommodating space 20. In this embodiment, the nail rail 3 is adapted to accommodate the nail 9.

[0050] The guide pin 4 is mounted on the housing unit 2 and disposed in the accommodating space 20, and includes a base plate 5 and an extension assembly 6.

[0051] See Figure 7 , Figure 8 and Figure 9 The substrate 5 has a base wall 51 extending in the vertical direction Z, and a groove 52 formed in the base wall 51. The base wall 51 has a flat rear side surface 511, a front side surface 512 opposite to the rear side surface 511 in the front-rear direction Y, and two abutment surfaces 513 opposite to the rear side surface 511 in the front-rear direction Y. The front side surface 512 faces the nail rail 3, and the abutment surfaces 513 are spaced apart in the left-right direction X. The left-right direction X is substantially perpendicular to the vertical direction Z and the front-rear direction Y.

[0052] See Figure 7 , Figure 8 and Figure 10(A) , 10(B) The groove portion 52 is recessed on the front side surface 512 and has a groove bottom surface 521 spaced apart from the abutting surface 513 along the front-rear direction Y, two groove peripheral side surfaces 522 respectively connected to the left and right sides of the groove bottom surface 521, a groove peripheral top surface 523 with two opposite ends connected to the groove peripheral side surfaces 522 along the left-right direction X, a first rib 524 extending along the vertical direction Z and protruding from the groove bottom surface 521, and two second ribs 525 extending along the vertical direction Z and protruding from the groove bottom surface 521.

[0053] Each of the groove peripheral side surfaces 522 is substantially perpendicularly connected to the groove bottom surface 521 and the corresponding abutment surface 513 on opposite sides along the front-rear direction Y. Each abutment surface 513 is separated from the groove bottom surface 521 by a first distance D1 along the front-rear direction Y. Each groove peripheral side surface 522 and the corresponding abutment surface 513 form an angle (not shown) between 85° and 95°, for example, 90°.

[0054] By integral injection molding, each of the groove peripheral side surfaces 522 is perpendicularly connected to the right-angled platform formed by the groove bottom surface 521 and the corresponding abutment surface 513 on opposite sides along the front-back direction Y. This generates sufficient abutment area to ensure that the nail can be firmly supported by the abutment surface 513 without shifting towards the groove bottom surface 521. Therefore, this embodiment does have the effect of stabilizing needle delivery.

[0055] See Figure 7 , Figure 8 and Figure 9 The second rib 525 is spaced apart along the left-right direction X and is located to the right of the first rib 524. In this embodiment, the first rib 524 and the second rib 525 are essentially convex strips. The length of each second rib 525 extending along the up-down direction Z is less than the length of the first rib 524 extending along the up-down direction Z, and each second rib 525 has a downwardly extending inclined surface 526 formed on its top side.

[0056] See Figure 7 , Figure 8 and Figure 10(A) , 10(B) The extension assembly 6 and the substrate 5 are integrally injection molded, and together with the substrate 5 define a needle-receiving space 40 facing the nail rail 3 and suitable for accommodating the nail 9. The extension assembly 6 has a first extension wall 61 and a second extension wall 62 spaced apart along the left-right direction X and extending from the front side 512 away from the rear side 511, and forms two extension wall surfaces 63 respectively formed on the side of the first extension wall 61 and the second extension wall 62 opposite to the base wall 51. The first rib 524 is close to the first extension wall 61 along the left-right direction X.

[0057] Since the extension group 6 and the substrate 5 in this embodiment are integrally injection molded, the material deformation during the stamping process can be prevented by directly shaping the substrate 5 using a mold. This prevents the rear side 511 of the substrate 5 from having corresponding protrusions or depressions, resulting in better flatness and a more aesthetically pleasing appearance.

[0058] The first extension wall 61 has a first inner wall surface 611 facing the needle-receiving space 40, a first groove 612 extending recessed from the corresponding extension wall surface 63 toward the front side surface 512, a first protrusion 613 adjacent to the corresponding extension wall surface 63 and facing the needle-receiving space 40, a first notch 614 opening downward and spaced apart from the first groove 612 along the vertical direction Z, and two grooves 615 respectively adjacent to the two opposite ends of the first protrusion 613 along the vertical direction Z. In this embodiment, the first protrusion 613 and the grooves 615 are formed on the first inner wall surface 611, and the first protrusion 613 and the grooves 615 are away from the groove portion 52 along the front-rear direction Y.

[0059] The second extension wall 62 is located to the right of the first extension wall 61 and has a second inner wall surface 621 facing the needle-receiving space 40, a second groove 622 extending recessed from the corresponding extension wall surface 63 toward the front side surface 512, a second protrusion 623 facing the needle-receiving space 40 and close to the groove portion 52, a second notch 624 opening downward and spaced apart from the second groove 622 along the vertical direction Z, a protruding ridge 625 facing the needle-receiving space 40 and moving away from the groove portion 52 along the vertical direction Z, and a notch 626 formed on the second inner wall surface 621 and opening toward the needle-receiving space 40. The second groove 622 extends a longer length along the vertical direction Z than the first groove 612 extends a longer length along the vertical direction Z, the second protrusion 623 is spaced apart from the first protrusion 613 along the vertical direction Z, and the second notch 624 is symmetrically arranged with the first notch 614 along the horizontal direction X.

[0060] Each of the extended wall surfaces 63 is spaced apart from the corresponding abutting surface 513 along the front-back direction Y, and is separated from the bottom surface 521 of the groove by a second distance D2 along the front-back direction Y, where D2:D1 is between 8:1 and 4:1, for example, 6:1.

[0061] Therefore, by using a structural design where the second distance D2 is greater than the first distance D1, compared to the existing method of using a cover to guide the pin 9, the first extension wall 61 and the second extension wall 62 of this embodiment can directly guide the pin 9 set on the pin rail 3 and ensure that the pin 9 is properly positioned. Thus, this embodiment can indeed save the cost of setting up an additional cover.

[0062] See Figure 5 , Figure 6 and Figure 11 The guide pin seat 7 is connected to the pin rail 3 and faces the guide pin member 4. In this embodiment, the guide pin seat 7 cooperates with the guide pin member 4 to define a driving port 70 that is spatially connected to the pin receiving space 40 and faces downward. The first notch 614 and the second notch 624 of the extension group 6 are adjacent to the driving port 70.

[0063] The guide pin seat 7 has a base 71 with two opposite sides facing the guide pin 4 and the pin rail 3 along the front-rear direction Y, and a fixing member 72 for connecting the base 71 and the pin rail 3. The base 71 has two guide pin portions 711 that can be respectively fitted into the first notch 614 and the second notch 624. Each guide pin portion 711 has a guide surface 712 near the nail hole 70. The guide surface 712 faces the guide pin 4 and is used to guide the pin 9. The fixing member 72 is essentially a locking screw.

[0064] The hammerhead 8 is disposed in the receiving space 20 and is operably movable along the vertical direction Z, and has a top end 81 and a bottom end 82 opposite to the top end 81 along the vertical direction Z. The bottom end 82 is adapted to contact and drive out the nail 9. In this embodiment, the hammerhead 8 is located above the nail hole 70 along the vertical direction Z, and can be driven by the pressure handle 21 to drive one of the nails 9 out of the nail hole 70. Since those skilled in the art can deduce the extended details of the hammerhead 8 and the pressure handle 21 from the above description, they will not be described in detail.

[0065] See Figure 5 , Figure 9 , Figure 11 and Figure 12 In this embodiment, the user can operate the pressure handle 21 to move the nail-driving plate 8 up and down, causing the bottom end 82 of the nail-driving plate 8 to drive out the corresponding nail 9. When the foremost nail 9 is driven out by the nail-driving plate 8, the nails 9 on the rear side will sequentially move towards the groove 52 along the front-rear direction Y. The structural design of the first protrusion 613 of the first extension wall 61 helps to guide the rear nail 9, achieving the effect of guiding the pusher. Furthermore, the protrusion 625 of the second extension wall 62 can also guide the nail-driving plate 8, preventing it from shifting along the left-right direction X.

[0066] See Figures 12 to 18 The following will describe the arrangement relationship between the various types of nails 9 and the guide nails 4 in sequence:

[0067] First, refer to Figure 12The pin 9 is generally U-shaped and has an inverted U-shaped top rod 91 and two pin bodies 92 connected to the left and right ends of the top rod 91 and extending downwards. When the pin 9 is a U-shaped pin, the pin 9 contacts the bottom surface 521 of the groove, and the lower edge of the U-shape of the top rod 91 can abut against the inclined surface 526 of the second rib 525. The pin body 92 on the left side of the pin 9 is located between the first rib 524 and one of the second ribs 525, while the pin body 92 on the right side is located between the other second rib 525 and the right side surface 522 of the groove.

[0068] Next, refer to Figure 13 When the nail 9 is a small U-shaped needle, the nail 9 contacts the bottom surface 521 of the groove, and the lower edge of the top rod 91 can abut against the top of the second protruding rib 525. The nail body 92 on the left side is between the first protruding rib 524 and one of the second protruding ribs 525, while the nail body 92 on the right side is between the other second protruding rib 525 and the right side of the groove circumferential side 522.

[0069] See also Figure 14 When the nail 9 is a large U-shaped needle and its width is greater than that of the aforementioned small U-shaped needle, the nail 9 contacts the bottom surface 521 of the groove, the top rod 91 is close to the top surface 523 of the groove, the nail body 92 on the left is located between one of the groove side surfaces 522 and the first protruding rib 524, and the nail body 92 on the right is adjacent to the other groove side surface 522.

[0070] Additionally, see Figure 15 and Figure 16(A) , 16(B) When the nail 9 is wider than the aforementioned large U-shaped needle, the push rod 91 of the nail 9 is close to the top surface 523 of the groove, and the nail body 92 abuts against the abutment surface 513. The nail body 92 on the left side is close to the first inner wall surface 611, while the nail body 92 on the right side is close to the second inner wall surface 621 and its bottom end abuts against the second protrusion 623. The first protrusion 613 of the first extension wall 61 can guide the nail body 92 on the left side, and the second protrusion 623 of the second extension wall 62 can guide the nail body 92 on the right side, further preventing the nail 9 from deviating or rotating in the left-right direction X during the process of being struck by the nail-driving piece 8, resulting in high operational stability.

[0071] Furthermore, the right-angled platform formed by the groove side surface 522 and the abutment surface 513 allows the nail body 92 to be stably supported on the abutment surface 513 without tilting towards the groove bottom surface 521. Therefore, this embodiment can indeed improve the stability of the needle delivery.

[0072] Finally, see Figure 17 and Figure 18 In other variations of this embodiment, the guide pin 4 further includes a fitting plate 41 connected to the extension assembly 6. The fitting plate 41 has a fitting wall 411 extending in the left-right direction X and fitted into the first groove 612 and the second groove 622, and a fitting groove 412 formed in the fitting wall 411 and facing the pin receiving space 40. The fitting wall 411 has a first fitting section 413 extending in the left-right direction X and protruding from the guide pin 4, and a second fitting section 414 extending downward from the right side of the first fitting section 413. The fitting groove 412 is formed in the second fitting section 414.

[0073] Therefore, when the pin 9 is a T-shaped pin, the push rod 91 of the foremost pin 9 can abut forward against the notch 626 of the guide pin 4, and the pin body 92 abuts against the abutment surface 513 on the right side. The bottom surface of the push rod 91 of the other pin 9 adjacent to the foremost pin 9 can abut against the fitting groove 412 (e.g., Figure 18 (As shown), while the bottom side of the top rod 91 of the remaining nails 9 abuts against the nail rail 3. The second protrusion 623 of the second extension wall 62 can contact and guide the nail body 92.

[0074] It should be noted that in other embodiments, the pin 9 may omit the top rod 91 and be generally L-shaped, and the nail body 92 of the pin 9 may also abut against the abutting surface 513, without limitation.

[0075] Based on the above explanation, the advantages of the aforementioned embodiments can be summarized as follows:

[0076] 1. The extension assembly 6 and the substrate 5 are integrally injection molded. Since injection molding directly shapes the material using a mold, it avoids material deformation problems that occur during the stamping process, thereby improving the flatness of the guide pin 4. Furthermore, through integral injection molding, the right-angled platform formed by each groove peripheral side surface 522 and the corresponding abutment surface 513 generates sufficient abutment area, ensuring that the pin 9 can firmly rest against the abutment surface 513 without tilting towards the groove bottom surface 521, thus achieving stable pin delivery.

[0077] 2. By using a structural design where the second distance D2 is greater than the first distance D1, compared to existing designs that require a guide rib on the cover to guide the nail, the first extension wall 61 and the second extension wall 62 in this embodiment can directly guide the nail 9 set on the nail rail 3, ensuring the nail 9 is properly positioned. Therefore, this embodiment also saves the cost of additional cover installation.

[0078] 3. The first protrusion 613 of the first extension wall 61 and the second protrusion 623 of the second extension wall 62 can guide the nail body 92 of the nail 9, thereby improving operational stability. In addition, the protruding ridge 625 of the second extension wall 62 can guide the nail-driving piece 8, further preventing the nail-driving piece 8 from deviating in the left-right direction X.

[0079] The above description is merely an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the claims and description of the present invention shall still fall within the scope of the present invention.

Claims

1. A pin guide, suitable for mounting on the housing unit of various pin guns, characterized in that: The guide pin includes: A substrate includes a base wall extending in a vertical direction and a groove formed in the base wall. The base wall has a flat rear side, a front side opposite to the rear side in a front-rear direction, and two abutting surfaces opposite to the rear side in the front-rear direction. The groove is recessed in the front side and has a groove bottom surface spaced apart from the abutting surfaces in the front-rear direction, and two groove peripheral side surfaces respectively connected to the left and right sides of the groove bottom surface. Each groove peripheral side surface is substantially perpendicularly connected to the corresponding abutting surface in the front-rear direction, and each abutting surface is spaced apart from the groove bottom surface by a first distance D1 in the front-rear direction. and An extension assembly, integrally injection molded with the substrate, surrounds and defines a needle-receiving space with the substrate. The extension assembly includes a first extension wall and a second extension wall spaced apart in the left-right direction and extending from the front side away from the rear side. It has two extension wall surfaces formed on the side of the first extension wall and the second extension wall opposite to the base wall, respectively. Each extension wall surface is spaced apart from the corresponding abutment surface in the front-back direction and is separated from the bottom surface of the groove by a second distance D2 in the front-back direction. The ratio of D2 to D1 is between 8:1 and 4:

1. The left-right direction is substantially perpendicular to the up-down direction and the front-back direction.

2. The guide pin as claimed in claim 1, characterized in that: The recessed portion of the substrate also has a first rib extending along the vertical direction and protruding from the bottom surface of the recess, the first rib being close to the first extending wall along the horizontal direction.

3. The guide pin according to claim 2, characterized in that: The groove portion of the substrate also has two second ribs that extend along the vertical direction and protrude from the bottom surface of the groove. The second ribs are spaced apart along the left-right direction, and the length of each second rib extending along the vertical direction is less than the length of the first rib extending along the vertical direction.

4. The guide pin as claimed in claim 1, characterized in that: The first extension wall of the extension group has a first protrusion adjacent to the corresponding extension wall surface and facing the needle space.

5. The guide pin according to claim 4, characterized in that: The second extension wall of the extension assembly has a second protrusion facing the needle space and close to the groove.

6. The guide pin according to claim 1, characterized in that: The guide pin further includes a fitting plate, the first extension wall having a first groove extending from the corresponding extension wall surface toward the front side, the second extension wall having a second groove extending from the corresponding extension wall surface toward the front side, the fitting plate being connected to the extension assembly and having a fitting wall extending along the left-right direction and fitted into the first groove and the second groove, and a fitting groove formed in the fitting wall and toward the pin receiving space.

7. The guide pin according to claim 6, characterized in that: The length of the second groove extending in the vertical direction is greater than the length of the first groove extending in the vertical direction.

8. The guide pin according to claim 1, characterized in that: The second extension wall has a raised ridge facing the needle space and away from the groove in the vertical direction.

9. A multi-needle nail gun, comprising: The housing unit surrounds and defines the accommodating space; A staple rail is provided in the accommodating space and is suitable for setting up multiple staples; Its features are: The various needle guns also include: The guide pin is disposed in the accommodating space according to any one of claims 1 to 8; A guide pin holder, connected to the pin rail and facing the guide pin member, the guide pin holder and the guide pin member cooperate to define a space communicating with the pin receiving space and having a downward-facing driving port; and A hammering tab is disposed in the accommodating space and operable to move along the vertical direction, the hammering tab being positioned above the hammering hole along the vertical direction and adapted to drive one of the nails out of the hammering hole.

10. The various needle guns according to claim 9, characterized in that: The first extension wall of the extension assembly has a first notch adjacent to the nail hole, and the second extension wall has a second notch adjacent to the nail hole and disposed opposite to the first notch in the left-right direction. The guide nail seat has two guide nail portions that can be respectively embedded in the first notch and the second notch, and each guide nail portion has a guide surface close to the nail hole.

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